Culpeper Crushed Stone Quarry (upper) (Triassic to of the United States)

Where: Culpeper County, Virginia (38.4° N, 77.9° W: paleocoordinates 13.1° N, 22.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Groveton Member (Bull Run Formation), Lacian to Lacian (221.5 - 212.0 Ma)

• early and/or middle Norian; also called the Balls Bluff Siltstone

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, black, gray, calcareous siltstone and mudstone

• alkaline or anoxic lake, followed by a playa environment
• "a number of massive mudstones are interbedded with much thinner, thinly layered, gray to black shales"

•"massive, calcareous cemented siltstone"

Size class: macrofossils

Preservation: mold/impression, trace

Collected by R. Weems, R. Litwin in the 1974–1985, 1990s

Collection methods: surface (in situ), peel or thin section,

Primary reference: J. R. Smith. 1982. Dinosaurs in Virginia—evidence of two new genera. Lapidary Journal 36(6):1110-1111 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 68890: authorized by Matthew Carrano, entered by Matthew Carrano on 12.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Pseudosuchia - Chirotheriidae
"Agrestipus hottoni n. gen. n. sp." = Brachychirotherium parvum2
"Agrestipus hottoni n. gen. n. sp." = Brachychirotherium parvum2 Hitchcock 1889 archosaur
AG-2, 4
 Ornithischia - Moyenisauropodidae
Anomoepus sp.1
Anomoepus sp.1 Hitchcock 1848 ornithopod
 Ornithischia -
Gregaripus bairdi n. gen. n. sp.2
Gregaripus bairdi n. gen. n. sp.2 Weems 1987 ornithischian
GE-1, 2, 11
 Theropoda - Grallatoridae
"Grallator cf. sillimani" = Eubrontes sillimani3, ? Grallator sp.2, Grallator cf. tuberosus3
"Grallator cf. sillimani" = Eubrontes sillimani3 Hitchcock 1843 theropod
AP-1
? Grallator sp.2 Hitchcock 1858 theropod
GA-1, 2; or cf, Al milfordensis
Grallator cf. tuberosus3 Hitchcock 1836 theropod
AN-1, 2, 3
 Theropoda -
Kayentapus minor4
Kayentapus minor4 Hitchcock 1858 theropod
misspelled "Eubrantes divaricatas"
1Dalman and Weems 2013; 2Weems 1987; 3Weems 1992; 4Weems 2006